99101-ZV5-1250 Main (#125) Jet - Overview. The 99101-ZV5-1250 Main (#125) Jet is a precision carburetor jet that supports the fuel system in Honda marine engine systems. This main jet controls the exact flow of fuel into the carburetor to ensure the engine runs smoothly and efficiently. Designed as a genuine OEM component, it guarantees seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Precision sized Main Jet (#125) for accurate fuel meteri